为什么，从一个Activity 跳到另一个Activity 出莫名的错误？

lxj105627 2012-01-06 09:55:41

报这样的错：The application has stoped unexpectedly.please try again!
求大虾们，指教？

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lxj105627 2012-01-06

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在manifest.xml增加activity

wo17796452 2012-01-06

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看log日志的输出错误

Bruce_N 2012-01-06

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在manifest.xml增加activity，我也经常忘记

hjkto 2012-01-06

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<?xml version="1.0" encoding="utf-8"?>

  <manifest xmlns:android="http://schemas.android.com/apk/res/android"

      package="irdc.ex03_09"

      android:versionCode="1"

      android:versionName="1.0.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

      <activity android:name=".EX03_09"

                android:label="@string/app_name">

        <intent-filter>

          <action android:name="android.intent.action.MAIN" />

          <category android:name="android.intent.category.LAUNCHER" />

        </intent-filter>

      </activity>

      <activity android:name="EX03_09_1"></activity>

    </application>

   <uses-sdk android:minSdkVersion="7" />

  </manifest>

hjkto 2012-01-06

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给你一个例子，对着例子看看



package irdc.ex03_09; 

/* import相关class */

import android.app.Activity;

import android.os.Bundle; 

import android.view.View;

import android.widget.Button;

import android.content.Intent;

public class EX03_09 extends Activity 

{

  /** Called when the activity is first created. */ 

  @Override 

  public void onCreate(Bundle savedInstanceState)

  { 

    super.onCreate(savedInstanceState);

    /* 加载main.xml Layout */ 

    setContentView(R.layout.main);

    /* 以findViewById()取得Button对象，并加入onClickListener */

    Button b1 = (Button) findViewById(R.id.button1);

    b1.setOnClickListener(new Button.OnClickListener()

    { 

      public void onClick(View v) 

      {

        /* new一个Intent对象，并指定要启动的class */ 

        Intent intent = new Intent(); 

        intent.setClass(EX03_09.this, EX03_09_1.class); 

        /* 调用一个新的Activity */ startActivity(intent);

        /* 关闭原本的Activity */ EX03_09.this.finish();

        } 

      });

    } 

  }



package irdc.ex03_09;

/* import相关class */

import android.app.Activity; 

import android.os.Bundle;

import android.content.Intent; 

import android.view.View; 

import android.widget.Button; 

public class EX03_09_1 extends Activity 

{ 

  /** Called when the activity is first created. */

  @Override

  public void onCreate(Bundle savedInstanceState)

  {

    super.onCreate(savedInstanceState); 

    /* 载入mylayout.xml Layout */ 

    setContentView(R.layout.mylayout); 

    /* 以findViewById()取得Button对象，并加入onClickListener */

    Button b2 = (Button) findViewById(R.id.button2);

    b2.setOnClickListener(new Button.OnClickListener()

    { 

      public void onClick(View v)

      { 

        /* new一个Intent对象，并指定要启动的class */ 

        Intent intent = new Intent(); 

        intent.setClass(EX03_09_1.this, EX03_09.class); 

        /* 调用一个新的Activity */ startActivity(intent); 

        /* 关闭原本的Activity */ 

        EX03_09_1.this.finish();

        } 

      });

    }

  }